> I always assumed ubuntu was brought down to prevent ubuntu servers from patching copy.fail

On Ubuntu copy.fail could be mitigated against with some modprobe(8) config tweaks:

    # echo "install algif_aead /bin/false" > /etc/modprobe.d/disable-algif.conf
    # rmmod algif_aead

There may be some processes that use this functionality ("lsof | grep AF_ALG"), but it is not that widespread AIUI, and so disabling it should not be an issue for the vast majority of systems.